spencer



A! C. 'SPENCERXQ A. EPPLER.

RECESSING MACHINE.

APPLICATION FILED OCT. 26, 1912.

Patented Aug. 29, 1916.

4 SHEETS-SHEET l.

Fig.1.

A. C. SPENCER & A. EPPLER. RECESSING MACHINE.

APPLICATION man OCT. 26. 19x2.

1 1 96,03. Patented Aug. 29, 1916.

4 SHEETS-SHEET 2.

l V/T/VESSS //v VENTURE I El (62M W zyuw Fig.5 M

A. C. SPENCER -& A. EPPLER.

RECESSING MACHINE.

APPLICATION HLED ocr. 26, I912.

1 1 96,043 Patented Aug. 29, 1916.

4 SHEETS-SHEET 3.

W/T/YESSES. l //v VENTURE.

A. C. SPENCER & A. EPPLEB.

RECESSING MACHINE.

APPLICATION FILED OCT. 26, I912.

Pit exited Aug. 29, 1916? 4 SHEETS-SHEET 4.

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5a 5 MM W UNITED STATES EATEN'E @FFEQE.

ALVAH C. SPENCER, OF BEVERLY, AND ANDREVI EPPLER, 0F LYNN, MASSACHUSETTS, ASSIGNORS TO UNITED SHOE MACHINERY COMPANY, QF EATER/SON, NEW JERSEY,

A CORPORATION OF NEW JERSEY.

RECESSING-LL'LCHINE.

Application filed. October 26, 1912.

T0 cZZ whom it may concern Be it known that we, ALvAi-r C. SPENCER and ANDREW Errnnn, citizens of the United States, residing at Beverly, in the county of Essex and State of Massachusetts, and Lynn,

in the county of Essex and State of Massachusetts, respectively, have lnvented certain Improvements 1n Recessing-Machines, of which the following description, in connection with the accompanying drawings, is a specification, like reference characters on the dra ings indicating like parts in the several figures.

This invention relates to a machine for cutting into the surface of leather or other material presented to the machine and is herein shown as embodied in a machine for forming a. recess in the upper face of a shoe sole.

In making underwedge shoes by the improved process disclosed in United States Letters Patent No. 1,050,040, granted Janumy 7, 1913, on a co-pending application of Adam H. Prenzel, an important step con sists in recessing the heel seat end of the sole for he reception of av heel seat piece. Inasmuch as prior machines for performing this operation have been somewhat limited in capacity by reason of the amount of time required to be used in adjusting the machines and in presenting the work to them, a particular aim of the present invention is to provide improved means for forming the recess in the heel seat end of'a sole employed in making shoes by the process of said copending application. It will be understood, however, that the invention is not restricted to such uses and that many of its novel fea tures are susceptible of wide application in the art to which the invention relates.

In general, the invention aims to provide a machine of the class described which will produce work of uniform quality for any given adjustment, which may be readily adjusted to adapt it to different grades of work, which is automatic in so far as is consistent with the character of the work which it performs, and which can be operated at comparatively high speed.

More particularly the invention aims to improve recessing machines of the type disclosed in the United States Letters Patent, Nos. 959,256 and 959,386, granted May 2a, 1910, on. applications of Adam H. Prenzel,

Specification of Letters Patent.

Patented A11 29, 1916.

Serial No. 727,914.

Figs. 2 and 3; Fig. 5 is a. detail perspective lllustrating the operation of the means for adjusting the inclination of the sole; Fig. 6 1s a view of a sole upon which the machine has operated; Fig. 7 is a perspective showing the means for "moving the work carriage to and fro and the means for clutching it to, and unclutching it from, the source of power; Fig. 8 is a plan view of the parts shown in Fig. 7; and Fig. 9 is a sectional view of the parts shown in Fig. 7; Fig. 10 is a plan view of the quick return mechanism; Fig. 11 shows a modification of the cutter adjusting means.

To bring the principal operative parts into convenient reach of the operator the head of the machine is provided with a post 2 which is adjustable vertically in a standard 4 in which is mounted a counter shaft 6 provided with av fast pulley 8, which may be belt may be shifted when it is desired to bring the machine to rest. In the preferred embodiment of the invention the rotary outter 12 is carried upon the end of a substantially vertical shaft mounted in bearings 14 in a vertically adjustable cutter carrying slide 16. The cutter shaft is provided with a belt pulley 18 over which passes a belt 20 by which the cutter shaft is driven. The belt 20 is guided by idlers 22 upon the back of the head of the machine and passes over a driving pulley 2% upon the shaft 6. The cutter carrying slide 16 may be adjusted toward and from the work carriage to vary the depth of cut by an adjusting screw 26 provided with a hand wheel 28, the adjusting screw 26 being confined against vertical movement by a plate 30 and being threaded into the slide 16. The work carriage 32 has a clove-tail shaped supporting portion which is guided in a dove-tail shapedguideway in the machine head 35 and this carriage 1S adapted to be recip rocated to and fro be.

ncath the cutter to carry the work across the path of operation of the cutter to effect the recessing operation.

The work is preferably presented to the work carriage when this carriage is at the left of the cutter, and means is preferably provided for automatically clamping the work upon the carriage as the carriage starts to move the work into operative relation to the cutter. The work clamping means comprises a sole support 36 arranged to be adjusted transversely to the path of movement of the carriage in order to vary the position of the front wall of the recess in the sole which receives the heel seat. The sole support is guided by a guide 38 which is dovetail shaped in cross-section whereby the sole support is confined against vertical movement relative to said guide. An adjusting screw 40 provided with a knurled head i2 and confined against longitudinal movement by a plate is threaded into a downward extension of the sole support 36 and serves to effect the adjustment of said sole support upon its guide 38. A sole centering and retaining gage plate i6 is fastened to the rear end of the sole support and the heel end of the sole to be operated upon is thrust against this plate and centered by it.

The sole support 36 and its guide 38 are carried by a swinging frame 4-8 carried upon trunnions 51 which turn in bearings 52 formed as upstanding lugs upon the carriage The reason for mounting the sole support in a swinging frame is to permit a variation of the inclination of the sole with respect to the cutter 12 to vary the inclination of the two walls of the recess which is to be cut by the cutter in the heel seat end of the sole. Inasmuch as the recess, as shown in Fig. 6, is to have an inclined front wall and a bottom which slopes from the heel end of the sole down to the lower edge of the front wall, the sole support is itself preferably inclined somewhat even when the swinging frame 4.8 is in central position. This normal inclination of the sole support can be varied by swinging the frame i8 on its trunnions. To permit the operator to adjust the swinging frame to vary the in clination of the sole and thereby vary the inclination of the two walls of the recess,

a handle is provided which is rigidly at tached to the swinging frame. A spring pressed locking pin 53 is mounted in a rearwardly extending arm 54 carried by the swinging frame and engages normally one or another of: the notches 5G in a stationary plate 58 whereby the swinging frame is locked automatically in its difierent positions of adjus ment. Adjustable stops 57 and 59 determine the range of swinging movement of the frame 48.

The sole is clamped upon the sole support 36 by a clamping plate 60 carried upon the lower end of the plunger 62 which slides in a vertical opening in an arched portion 6% of the swinging frame t8, the upper end of said plunger being pivotally connected to a lever 66 fulcrumed at 68 upon said swinging frame. The lever 66 is yieldinglymoved in the direction to cause the clamping plate (30 to clamp the sole against the sole sup port 36 by a spring 70 connected at one end to said lever near its outer end and at its other end connected to a stud upon the swinging frame 4-8. To maintain the two members of the sole clamp in sepr 'ated relation so that the sole may be easily insertd, a toggle 72, 7% is provided, the upper link 72 of the toggle being connected to the outer end of the lever 66 and the lower link 7 f being connected to a lateral extension or lug 76 formed upon the swinging frame 4-8. The lower link 7% of the toggle h s a downward extension 78 below the lower pivot of the toggle and through this extension the toggle is straightened and broken.

In Fig. 3 of the drawings the toggle is shown in its broken condition and a sole 80 is shown clamped between the clamp member 60 and the sole support 36. As the carriage 32 comes to the right-hand limit of its movement, an adjustable stop 82 strikes one end of a sliding pin 8% arranged to slide in a dependent portion 86 of the carriage and causes the rounded head 88 of said pin to strike the extension 78 of the toggle link 75': whereby the toggle is moved into 'ghtenod position, he straightening mm c rent being overdone so that the knee joint on the other side of the line through the upper and lower pivots from its position in Fig. 3. In this position the toggle is prevented from breaking in this direction by a lug 90 upon the other arm of a yoke-like part 91 of the link 74: which engages an edge of the swinging frame -18, as shown in Fig. i. The straightening of the toggle raises the lever 66 and. unclamps the work so that the sole may be withdrawn from the carriage by the operator as the carriage reaches the ri ht-hand end of its movement. The toggle remains in its straightened condition until the carriage has again come to the left-hand end of its movement when the extension 78 of the link T4 strikes the end 92 of the recess in the machine head below the carriage 39, thus causing the toggle to be broken. Before the toggle is broken. however, the yoke portion 91 of the link 7-1 has come above av shoulder 94 upon a dog 98 pivoted at 98 between ears 100 formed upon the machine head, the dog being pressed normally toward the carriage by a spring 102. AS the toggle is broken, the yoke part 91 of the link 74 rests upon the shoulder 94.- and prevents the toggle from breaking suiiiciently to interfere with placing a sole in position between the clamp member and the sole support 36. If the mechanism through which the carriage has been actuated is released by the operator before the carriage returns to the right-hand limit of its move ment the means for reciprocating the carriage will be unclutched from the source of power and the carriage will stop at the left-hand limit of its movement with the parts in the position shown in Fig. 2. The operator can then place a sole in position between the clamp member 60 and the sole support 36 before he again actuates the mechanism which reciprocates the carriage. To aid in centering the sole properly between the clamp members, adjustable gage members 104 and 106 are provided upon the front of the swinging frame 48.

The mechanism for reciprocating the carriage comprises, in one embodiment of the invention, a crank arm 108 rigidly attached to the upper end of a vertical shaft'llO which may be clutched by suitable clutch mechanism, hereinafter to be described, to a worm gear 112 driven from a worm 114 upon a horizontal shaft 116 provided with a belt pulley 118 by which it may be connected to a pulley 120 upon the driving shaft 6. The clutch mechanism is of the one-rotation, Horton clutch type, that is, the shaft 110, when it is clutched to the worm gear 112, will make a. complete rotation before it is unclutched, even if the operator removes his foot from the treadle before the end of said rotation. There is no provision, however, for preventing a continuous succession of rotations of the shaft 110 provided the operator maintains his foot upon the treadle. In one embodiment of the in vention, the crank arm 108 carries at its outer end a pivot 122 upon which is pivoted a sliding block 124 which slides in a transverse groove 126 in the downward extension 86 of the carriage 32 as the crank arm turns about the axis of the shaft 110.

In Fig. 10 is illustrated another form of means for reciprocating the carriage 32, by which the speed of the machine and its capacity for handling work may be increased. It will be observed from the foregoing description that the work is removed from the machine when the carriage reaches the right hand limit of its movement, and that the machine performs no useful operation during the return movement of the carriage. It is important, therefore, that the time of the return movement of the carriage be reduced to a minimum. To this end the carriage operating means shown in Fig. 10 has been so designed that the return movement of the carriage is much faster than the work presenting movement of the carriage. In the illustrated construction the return movement takes place in about 120 of the rotation of the shaft 110, while the work presenting movement of the carriage requires about 240 of the rotation of said shaft.

The illustrated quick return mechanism comprises a lever 119 pivoted at 121 upon a rearward extension of the head 35. The lever 119 is provided with a slideway 123 in which the block 124 on the arm 108 is adapted to slide as said arm rotates with the shaft 110. Near its free end the lever 119 carries a block 125' adapted to slide in the guideway 126 in the downward extension 86 of the carriage 32. From an inspection of Fig. 10 it will be noted that when the arm 108 is moving the carriage 32 in the direction to present the work to the cutter 12, the block 124 is near the outer end of the slot 123 in the lever 119 and therefore the movement transmitted to the carriage 32 through said lever is comparatively slow. hen the arm 108 is returning the carriage 32 to its work receiving position, the block 124 travels near the inner end of the slot 123 in the lever 119 and therefore the movement of the carriage is much more rapid since the movement of the outer end of the lever 119 which carries the block 125 is much faster than the inner end upon'which the block 124 is operating.

The illustrated Horton clutch comprises a roll cage 128 which controls the clutch rolls 130 which are adapted to be clutched between a steel ring 132 upon the "inside of a flange 134 formed upon the worm gear 112 and eccentric portions of another clutch member 136 attached to the shaft 110. The roll cage 128 is spring-pressed in the clutching direction in the usual manner by a spring 138 and is provided with a stop 140 adapted to cooperate with a second stop 142 upon a clutch controlling lever 144. The clutch controlling lever 144 is normally held by a spring 146 in such position that its stop 142 lies in the path of movement of the stop 140 so that as the shaft 110 turns the stop 140 will engage the stop 142 and the roll cage 128 will be turned in the direction to unclutch the shaft 110 from the worm gear 112.

The means for disengaging the stops to permit the roll cage to again clutch the shaft 110 to the worm gear 112 comprises a bellcrank lever 148 having one arm connected by a link 150 to a treadle 152 in the base of the machine, and having another arm connected to a slide 154 adapted to engage the H clutch controllin lever 144. A. spring 156 connected to a lug extending downwardly below the pivot of the bell crank 148 tends to maintain said treadle normally in its uppermost position and to maintain the slide 154 in its inoperative position. \Vhen the recdle is depressed, therod 154 moves the clutch controlling lever in a clockwise direction in Fig. 8 and moves the stop 142 out of engagement with the st p 140, thereby permitting the shaft 110 to be clutched to the worm gear 112.

In order to insure that the sole shall abut against the gage plate as when it is put in position between the cla p members of the clamping means, means is provided for yieldingly pressing said sole down upon the sole support. The illustrated means comprises an overhanging arm 158 having a curved end to facilitate slipping the sole beneath it, the arm being pivoted between ears on a bracket 160 bolted upon the ma chine head and being pressed yieldingly toward the sole support by a spring 162 received in a socket in the bracket 160. The arm 158 does not travel with the carriage 32, since, after the sole is clamped upon the support, it is not necessary to bear down upon the upper face of the sole in order to maintain it in proper position upon the sup port. li loreover the arm, if it traveled with the carriage, would project into the field of operation of the cutter. The sole is therefore moved from under the arm 158 by the movement of the carriage toward the cutter.

In Fig. 11 is shown a modification of the machine in which the vertical adjustment or the cutter is obtained in a different way and in which provision is made also for varying the inclination of the cutter in order to vary the inclination of the bottom of the recess in the sole to the face of the sole. 1n the construction shown in Fig. 11, the part 16% 01": the head of the machine in which the cutter shaft is mounted is flll crumed at 166 upon the upstanding lug .68 of the part 170 of said head in which the carriage 32 is guided. By rocking the part 16% about the fulcrum 166, the cutter 12 may be moved toward and away from the sole support 36 to vary the depth of the recess which the cutter forms in the sole. The part 164 is held in its different adjusted re lations to the part 170 by a set screw 172 threaded through a downward extension 174: of said part and bearing against the rear edge of the table 37 and by two other set screws 176 threaded through lateral lugs 178 upon said part 16 of the head and bearing upon the upper face of the part 170 of the head. To provide for varying the angle of inclination of the cutter 12 to the sole sup port 36, he part 164- of the head is made in two parts clamped together by a set screw 180 and adjustable with relation to each other along an. are having its center at the front edge of the cutter 12. A scale 182 and an index 18% show the angle of inclination of the cutter to the vertical.

F :11 'ng described our invention, what we claim as new and desire to secure by Letters Patent of the United States is:

1. A machine of the class described comprising, in combination, a cutter, a reciproeating carriage to carry the Work across the field of operation of said cutter, spring operated work clamping means upon said carriage, means for automatically actuating said clamping means to permit said spring to effect the clamping of the work a the carriage starts to present the work to the cutter, and means for moving said clamping means into work releasing position against the tension of said spring after the work has been presented to the cutter.

2. In a machine of the class described, a cutter, a reciprocating carriage arranged to carry the work across the field of operation of said cutter and then to return to work receiving position, self-contained work clamping means upon said carriage, means at the initial end of the path of movement of said carriage for rendering said clamping means operative, and means at the other end of said path of movement for rendering said clamping means inoperative, whereby the work may beremoved from said clampiijig means after the carriage has carried said work across the field of operation of the cutter, said clamping means being constructed to maintain itself in operative condition during the work carrying movement of said carriage.

111 a machine of the class described, a cutter, a reciprocating carriage arranged to carry the work across the field of operation of said cutter and then. to return to work receiving position, self-contained work clamping means upon said carriage, means at the initial end of the path of movement of said carriage for rencering said clamping means operative, and means at the other end of said path of movement for rendering said clamping means inoperative, said clamping means being constructed to maintain itself in clamping condition during the work carrying movement of said carriage and to maintain itself in released condition during the return movement of said carriage.

4. In a machine of the class described, a cutter, a reciprocating carriage arranged to carry the work across the field operation of said. cutter and then to return to work receiving posit-ion, spring operated self-contained work clamping means upon said carriage, constructed to maintain itself either in operative condition or in inoperatire condition, and means at the initial end the path of movement of said carriage op erating to hold said clamping means inoperative until said carriage begins to move but constructed to cans said clamping means to become operative when said carriage does begin its work presenting movement.

In a machine of the class described, a cutter, a reciprocating carriage arranged to carry the work across the field of operation of said cutter, springpperated work clamping means upon said carriage, means at one end of the path of movement of said carriage for holding said clamping means in inoperative condition arranged to permit said clamping means to become operative as the carriage begins its Work presenting movement, and means at the other end of said path of movement for moving said clamping means into Work releasing position.

6. A machine of the classdescribed comprising, in combination, a cutter, a carriage to carry the Work to and fro across the field of operation of said cutter, Work clamping means upon said carriage yieldingly held normally in operative clamping condition, means comprising a toggle for rendering said clannaing means inoperative, means at one end of the path of movement of said carriage for automatically straightening said toggle and means at the other end of the path of movement of said carriage for automatically breaking said toggle.

7. A machine for recessing leather articles comprising, in combination, a cutter, a reciprocating carriage arranged to carry the Work across the field of operation of said cutter to present a piece of Work to the cutter in position for the removal of a portion of the stock to form a recess in the Work, and a single means for effecting the reciprocation of said carriage, said means being constructed to effect such reciprocation automatically during a continuous movement of said means and to cause the return movement of said carriage to be faster than the Work presenting movement.

8. A machine for recessing leather articles comprising, in combination, a cutter, a carriage horizontally movable to and fro to carry the Work across the field of operation of said cutter to present successive pieces of Work to the cutter for the formation of recesses in the said pieces of Work,

less than the time required to effect the Work presenting movement of the carriage, Whereby a succeeding piece of Work may quickly be placed in the open clamping means.

9. A machine of the class described comprising, in combination, a cutter, a carriage to carry the Work across the field of operation of said cutter, a Work support upon said carriage, means for clamping the Work upon the Work support, and means for moving said Work support bodily relatively to said clamping means across the path of movement of said carriage.

10. A machine of the class described comprising, in combination, a cutter, a carriage to carry the Work across the field of opera- 7o tion of said cutter, Work locating and retaining means upon said carriage into which the Work is moved across the carriage, and stationary means outside and above said carriage for directing the Work into said retaining means, said carriage moving out of operative relation to said stationary directing means as it moves into operative relation to said cutter.

In testimony whereof We have signed our so names to this specification in the presence of two subscribing Witnesses.

ALVAH C. SPENCER. ANDREW EPPLER.

l/Vitnesses:

CHESTER E. Roenns, RUTH E. W'ARD.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. O. 

